Rock core seepage characteristic analysis simulation device

Abstract

The utility model relates to a rock core seepage characteristic analysis simulation device, and belongs to the technical field of rock core seepage characteristic analysis equipment. The rock core seepage characteristic analysis simulation device comprises a measuring assembly, a communicating pipe, a clamp holder, a confining pressure pump, a back pressure valve, a back pressure pump, a foam generator, a piston container A, a piston container B, a piston container C, a constant-flux pump A and a constant-flux pump B, the lower end of the communicating pipe is connected in parallel with a foam generator, a piston container A, a piston container B and a piston container C through a feeding valve; and the lower ends of the foam generator and the piston container A are connected with a constant-flux pump A through a pressure supply valve. The rock core seepage characteristic analysis simulation device is compact in structure and ingenious in design, the problem that an existing simulation device cannot simulate a carbon dioxide foam gas injection process is solved, and the rock core seepage characteristic analysis simulation device is particularly suitable for rock core seepage characteristic analysis.

Description

Technical Field

[0001] This utility model relates to a core seepage characteristic analysis simulation device, belonging to the technical field of core seepage characteristic analysis equipment. Background Technology

[0002] In oilfield development, carbon dioxide foam injection is commonly used to improve the recovery rate of low-permeability reservoirs. To verify the operating principle and effectiveness of carbon dioxide foam injection, simulation devices are often used for testing. Existing simulation devices, such as the carbon dioxide dynamic water-rock reaction measurement device disclosed in patent application CN119715309A, while achieving a certain degree of simulation of the carbon dioxide injection process, do not use pure carbon dioxide in oilfields. Instead, carbon dioxide foam is composed of carbon dioxide, foaming agents, foam stabilizers, and related additives. Therefore, existing simulation devices cannot accurately simulate carbon dioxide foam injection tests. Thus, it is necessary to develop a core seepage characteristic analysis simulation device to address the aforementioned problems of existing simulation devices. Summary of the Invention

[0003] The purpose of this invention is to provide a core seepage characteristic analysis simulation device with a compact structure and ingenious design, which solves the problem that existing simulation devices cannot simulate carbon dioxide foam injection process.

[0004] The technical solution of this utility model is:

[0005] A core flow characteristic analysis simulation device includes a measuring component, a connecting pipe, a clamp, a confining pressure pump, a back pressure valve, a back pressure pump, a foam generator, piston container A, piston container B, piston container C, a horizontal flow pump A, and a horizontal flow pump B. The device is characterized in that: the lower end of the connecting pipe is connected in parallel to the foam generator, piston container A, piston container B, and piston container C via a feed valve; the lower ends of the foam generator and piston container A are connected to the horizontal flow pump A via a pressure supply valve; the lower ends of piston containers B and piston container C are connected to the horizontal flow pump B via a pressure supply valve; the upper end of the connecting pipe is connected in parallel to the switching valve A and the switching valve B; one end of the switching valve B is connected to the clamp; the outer side of the clamp is connected to the confining pressure pump; the output end of the clamp is connected to the back pressure valve and the back pressure pump; and the outlet end of the back pressure valve is connected to the measuring component.

[0006] One end of the switching valve A is connected to a carbon dioxide supply pipe.

[0007] The foam generator includes a sealed container, an upper sealing cover, a lower sealing cover, a pressure-transmitting piston, and a stirring blade; the sealed container is equipped with an upper sealing cover and a lower sealing cover at both ends; the pressure-transmitting piston is installed inside the sealed container; and the stirring blade is installed on the upper part of the sealed container via a motor.

[0008] Piston container A, piston container B and piston container C each include a container body, a sealing plate and a sliding piston; the two ends of the container body are respectively equipped with detachable sealing plates; the sliding piston is installed inside the container body.

[0009] The measuring components include a burette, a measuring beaker, an electronic scale, a dryer, and a flow meter; the upper end of the burette is fitted with a sealing plug; the outlet end of the back pressure valve is connected to a guide tube; the guide tube passes through the sealing plug and extends into the interior of the burette; an electronic scale is mounted below the burette; a measuring beaker is placed on the electronic scale; an output tube is connected to the sealing plug; one end of the output tube is connected to the dryer and the flow meter in sequence.

[0010] The advantages of this utility model are:

[0011] This core seepage characteristic analysis simulation device is compact and ingeniously designed. It can adjust carbon dioxide foam through a foam generator, thereby solving the problem that existing simulation devices cannot simulate carbon dioxide foam injection processes. It is particularly suitable for the needs of core seepage characteristic analysis. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the measuring component of this utility model;

[0014] Figure 3 for Figure 1 A magnified structural diagram of point A in the middle.

[0015] In the diagram: 1. Connecting pipe; 2. Feed valve; 3. Foam generator; 4. Piston container A; 5. Piston container B; 6. Piston container C; 7. Pressure valve; 8. Flow pump A; 9. Flow pump B; 10. Switch valve A; 11. Switch valve B; 12. Clamp; 13. Confining pressure pump; 14. Back pressure valve; 15. Back pressure pump; 16. Measuring component; 17. Carbon dioxide feed pipe; 18. Sealed container; 19. Upper sealing cap; 20. Lower sealing cap; 21. Pressure transmitting piston; 22. Stirring blade; 23. Container body; 24. Sealing plate; 25. Sliding piston; 26. Sealing plug; 27. Guide pipe; 28. Electronic scale; 29. ​​Measuring beaker; 30. Output pipe; 31. Dryer; 32. Flow meter; 33. Burette. Detailed Implementation

[0016] The core flow characteristic analysis simulation device includes a measuring component 16, a connecting pipe 1, a clamp 12, a confining pressure pump 13, a back pressure valve 14, a back pressure pump 15, a foam generator 3, piston containers A4, B5, and C6, and horizontal flow pumps A8 and B9 (see the instruction manual appendix). Figure 1 ).

[0017] The lower end of the connecting pipe 1 is connected in parallel to the foam generator 3, piston container A4, piston container B5 and piston container C6 via the feed valve 2.

[0018] The foam generator 3 includes a sealed container 18, an upper sealing cover 19, a lower sealing cover 20, a pressure transmitting piston 21, and a stirring blade 22; the upper sealing cover 19 and the lower sealing cover 20 are respectively installed at both ends of the sealed container 18; the pressure transmitting piston 21 is installed inside the sealed container 18; the stirring blade 22 is installed at the upper part of the sealed container 18 via a motor (see the attached instruction manual). Figure 3 ).

[0019] When the stirring blade 22 is working, it can stir the carbon dioxide, foaming agent, foam stabilizer and related additives that enter the sealed container 18 to produce carbon dioxide foam.

[0020] Piston containers A4, B5, and C6 all include a container body 23, a sealing plate 24, and a sliding piston 25 (see the appendix to the instruction manual). Figure 3 The container body 23 is equipped with removable sealing plates 24 at both ends; the container body 23 is equipped with a sliding piston 25 (see the instruction manual). Figure 3 During operation, the sliding piston 25, when subjected to force, can push the material on the upper part of the container body 23 out of the container body 23.

[0021] The lower ends of the foam generator 3 and piston container A4 are connected to a horizontal flow pump A8 via a pressure supply valve 7 (see instruction manual appendix). Figure 1 When the horizontal flow pump A8 is working, it can drive the pressure-transmitting piston 21 and sliding piston 25 in the foam generator 3 and piston container A4 through the pressure supply valve 7 and the pressure transmission medium, thereby achieving the purpose of controlling the material output in the foam generator 3 and piston container A4.

[0022] The lower ends of piston containers B5 and C6 are connected to a horizontal flow pump B9 via a pressure supply valve 7 (see instruction manual appendix). Figure 1 When the horizontal flow pump B9 is working, it can drive the sliding piston 25 in piston container B5 and piston container C6 to move through the pressure supply valve 7 and the pressure transmission medium, thereby achieving the purpose of controlling the material output in piston container B5 and piston container C6.

[0023] The upper end of the connecting pipe 1 is connected in parallel with switch valve A10 and switch valve B11 (see the instruction manual appendix). Figure 1 One end of the switching valve A10 is connected to a carbon dioxide supply pipe 17 (see the instruction manual appendix). Figure 1 During operation, high-pressure carbon dioxide will be supplied to the analytical simulation device through carbon dioxide supply pipe 17 and switching valve A10.

[0024] One end of the switching valve B11 is connected to a clamp 12; a confining pressure pump 13 is connected to the outside of the clamp 12; a back pressure valve 14 and a back pressure pump 15 are connected to the output end of the clamp 12 (see the instruction manual appendix). Figure 1 The clamp 12, confining pressure pump 13, back pressure valve 14, and back pressure pump 15 are all purchased equipment.

[0025] The outlet end of the back pressure valve 14 is connected to the measuring component 16 (see the instruction manual appendix). Figure 1 ).

[0026] Measuring assembly 16 includes a burette 33, a measuring beaker 29, an electronic scale 28, a desiccator 31, and a flow meter (see instruction manual appendix). Figure 3 ).

[0027] The upper end of the burette 33 is fitted with a sealing plug 26; the outlet end of the back pressure valve 14 is connected to a guide tube 27; the guide tube 27 passes through the sealing plug 26 and extends into the interior of the burette 33; an electronic scale 28 is installed below the burette 33; a measuring beaker 29 is placed on the electronic scale 28; an output tube 30 is connected to the sealing plug 26; one end of the output tube 30 is connected in sequence to a dryer 31 and a flow meter 32 (see the instruction manual appendix). Figure 2 ).

[0028] When the core seepage characteristic analysis simulation device is working, first open the sealing plate 24 at the top of piston container A4, piston container B5 and piston container C6. Then, according to the design weight, the foaming agent, foam stabilizer and additives are loaded into piston container A4, piston container B5 and piston container C6 respectively, and the sealing plate 24 is installed.

[0029] After the above steps are completed, open the switch valve A10 and the feed valve 2 at the top of the foam generator 3. At this time, high-pressure carbon dioxide will enter the foam generator 3 through the carbon dioxide feed pipe 17 and the switch valve A10. During this process, with the cooperation of the horizontal flow pump A8, horizontal flow pump B9, pressure supply valve 7 and feed valve 2, piston containers A4, B5 and C6 respectively input the foaming agent, foam stabilizer and additive into the foam generator 3.

[0030] After carbon dioxide, foaming agent, foam stabilizer and additives enter the foam generator 3, carbon dioxide foam can be formed under the stirring action of the stirring blade 22. After the carbon dioxide foam is prepared and shaped, the horizontal flow pump B9, pressure supply valve 7 and switch valve A10 are closed; then the switch valve B11 is opened, so that the foam generator 3, with the cooperation of the horizontal flow pump A8, the corresponding pressure supply valve 7 and the feed valve 2, inputs the carbon dioxide foam into the clamp 12.

[0031] After carbon dioxide foam enters the holder 12, it passes through the rock core inside to form permeate fluid. The permeate fluid passes through the back pressure valve 14 and enters the burette 33. After the permeate fluid enters the burette 33, the permeate liquid in the permeate fluid will fall into the burette 33, and the permeate gas in the permeate fluid will pass through the dryer 31 and the flow meter 32. The flow meter 32 will measure the permeate gas.

[0032] After the above steps are completed, open the burette 33 to allow the permeate to fall into the measuring beaker 29, and measure the weight using the electronic scale 28. At this point, the core seepage characteristic analysis simulation device has completed the carbon dioxide foam injection simulation experiment. After cleaning, the core seepage characteristic analysis simulation device can proceed to the next working cycle.

[0033] This core seepage characteristic analysis simulation device is compact and ingeniously designed. It can adjust carbon dioxide foam through foam generator 3, thereby solving the problem that existing simulation devices cannot simulate carbon dioxide foam injection process. It is particularly suitable for the needs of core seepage characteristic analysis.

Claims

1. A core seepage characteristic analysis simulation device, comprising a measurement component (16), a connecting pipe (1), a clamp (12), a confining pressure pump (13), a back pressure valve (14), a back pressure pump (15), a foam generator (3), piston container A (4), piston container B (5), piston container C (6), horizontal flow pump A (8), and horizontal flow pump B (9); characterized in that: The lower end of the connecting pipe (1) is connected in parallel to a foam generator (3), piston container A (4), piston container B (5) and piston container C (6) via a feed valve (2); the lower ends of the foam generator (3) and piston container A (4) are connected to a horizontal flow pump A (8) via a pressure supply valve (7); the lower ends of the piston container B (5) and piston container C (6) are connected to a horizontal flow pump B (9) via a pressure supply valve (7); the upper end of the connecting pipe (1) is connected in parallel to a switch valve A (10) and a switch valve B (11); one end of the switch valve B (11) is connected to a clamp (12); the outside of the clamp (12) is connected to a confining pressure pump (13); the output end of the clamp (12) is connected to a back pressure valve (14) and a back pressure pump (15); the outlet end of the back pressure valve (14) is connected to a measuring component (16).

2. The core seepage characteristic analysis and simulation device according to claim 1, characterized in that: One end of the switching valve A (10) is connected to a carbon dioxide supply pipe (17).

3. The core seepage characteristic analysis and simulation device according to claim 1, characterized in that: The foam generator (3) includes a sealed container (18), an upper sealing cover (19), a lower sealing cover (20), a pressure-transmitting piston (21), and a stirring blade (22); the upper sealing cover (19) and the lower sealing cover (20) are respectively installed at both ends of the sealed container (18); the pressure-transmitting piston (21) is installed inside the sealed container (18); the stirring blade (22) is installed on the upper part of the sealed container (18) via a motor.

4. The core seepage characteristic analysis and simulation device according to claim 1, characterized in that: The piston container A (4), piston container B (5) and piston container C (6) all include a container body (23), a sealing plate (24) and a sliding piston (25); the two ends of the container body (23) are respectively equipped with detachable sealing plates (24); the interior of the container body (23) is equipped with a sliding piston (25).

5. The core seepage characteristic analysis and simulation device according to claim 1, characterized in that: The measuring assembly (16) includes a burette (33), a measuring beaker (29), an electronic scale (28), a dryer (31), and a flow meter; the upper end of the burette (33) is fitted with a sealing plug (26); the outlet end of the back pressure valve (14) is connected to a guide tube (27); the guide tube (27) passes through the sealing plug (26) and extends into the interior of the burette (33); the electronic scale (28) is installed below the burette (33); the measuring beaker (29) is placed on the electronic scale (28); the sealing plug (26) is connected to an output tube (30); one end of the output tube (30) is connected to the dryer (31) and the flow meter (32) in sequence.

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